Dynamic field quality of LHC/Saclay arc quadrupole magnet prototype

Author

Devred, A. ; Belorgey, J. ; Deregel, J. ; Gallet, B. ; Genevey, P. ; Kircher, F. ; Rifflet, J.M. ; Sellier, J.C. ; Védrine, P. ; Billan, J. ; Ogitsu, T.

Author_Institution

DSM/DAPNIA/STCM, CEA, Centre d´´Etudes Nucleaires de Saclay, Gif-sur-Yvette, France

Volume

3

fYear

1997

fDate

12-16 May 1997

Firstpage

3365

Abstract

As part of the magnet R&D program for the Large Hadron Collider (LHC), CEA Saclay has designed and built two 3-m-long, 56-mm-twin-aperture are quadrupole magnet prototypes. Extensive field quality measurements were performed during the cold-test of the second prototype. A review of the field quality data as a function of ramp rate is presented. The observed field distortions are explained in terms of inter-strand coupling currents arising from low and non-uniform resistances at the crossovers between the strands of the two-layer Rutherford-type cable. Last, the distribution of crossover resistances within the quadrupole magnet coil is determined

Keywords

accelerator magnets; magnetic field measurement; proton accelerators; storage rings; superconducting magnets; synchrotrons; LHC; Large Hadron Collider; crossover resistances; field distortions; field quality measurements; inter-strand coupling currents; quadrupole magnet prototype; two-layer Rutherford-type cable; Iron; Large Hadron Collider; Magnetic field measurement; Power cables; Prototypes; Saturation magnetization; Superconducting cables; Superconducting coils; Superconducting filaments and wires; Superconducting magnets;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.753210

Filename

753210